10 Questions 10 Marks 6 Mins
Concept:
W = Kf - Ki \(W = \frac{1}{2}m{v^2} - \frac{1}{2}m{u^2} = {\bf{\Delta }}K\,\) Where v = final velocity, u = initial velocity and m = mass of the body Calculation: Given - mass (m) = 1500 kg, initial velocity (u) = 36 km/h = 10 m/s and final velocity (v) = 72 km/h = 20 m/s
\(\Rightarrow W = \frac{1}{2}m({v^2} - {u^2} )\,\) \(\Rightarrow W = \frac{1}{2}\times 1500\times ({400} - {100} )=2.25\times10^5\, J\,\) India’s #1 Learning Platform Start Complete Exam Preparation
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What is the work done to increase the velocity of car from 36 km per hour to 72 km per hour if the mass is 1500 kg?
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